And they've already located some problem spots like belts, or hoses with tiny holes that can cause big problems.

“Because your system works under pressure and so any time there is a leak anywhere or a hole, it's going to look for the leak. Belts and hoses are very important. If a belt breaks nowadays you are pretty much stuck; you can't go anywhere,” says Wes Johnson with Greg's.

Right now Interstate 80 west over Donner is clear.

But it's only a matter of time before it looks like a winter wonderland, or mess, depending upon your preparedness.

Something as simple as good working windshield wipers and tires with tread can't be over-emphasized.

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